Global patterns of sex-biased migrations in humans

Global patterns of sex-biased migrations in humans
Chuan-Chao Wang, Li Jin, Hui Li
(Submitted on 29 Oct 2013)

A series of studies have revealed the among-population components of genetic variation are higher for the paternal Y chromosome than for the maternal mitochondrial DNA (mtDNA), which indicates sex-biased migrations in human populations. However, this phenomenon might be also an ascertainment bias due to nonrandom sampling of SNPs. To eliminate the possible bias, we used the whole Y chromosome and mtDNA sequence data of 491 individuals from the 1000 Genomes Project Phase I to address the sex-biased migration dispute. We found that genetic differentiation between populations was higher for Y chromosome than for the mtDNA at global scales. The migration rate of female might be three times higher than that of male, assuming the effective population size is the same for male and female.

2 thoughts on “Global patterns of sex-biased migrations in humans

  1. Indeed:

    . In fact, polygyny, higher rates of male mortality, or a greater variance in male lifetime reproductive success can decrease the effective population size of males (Wang et al., 2013). Whether the discrepancy in effective population size between male and female can account for the three times among-population genetic variation still needs further

    The highest probability scenario to me seems to be (at least last 10,000 years) rare but large translations and replacement of male lineages (e.g., India, South America) set against a dominant continuous background pattern of patrilocality. Though I’m less confident of patrilocality as being a good default than I was in the past.

  2. I have always noticed regions and ethnic groups are usually defined more by their y DNA haplogroup. Like in Germanic and Italo Celtic speakers R1b1a2a1a L11 is dominate in Indo Iranian speakers(at least bronze and iron age ones fro central asia) by R1a1a1b2 Z93, Former areas of Corded ware culture are dominated by R1a1a1b1 Z283(Germanic and Italo Celtic dominance in central Europe, Norway, and Sweden lowered it in those areas). Y DNA N1c1 dominates areas of Mesolithic Kunda culture and in most Uralic speakers in Europe. Y DNA J1a dominates Arabia and is very popular in many semetic’s. E1b1b1 dominates north Africa, y DNA O dominates east Asia, Q M3 dominates Native Americans, etc. Y DNA haplogroups at least in Europe and the Middle east are much less spread out than mtDNA haplogroups and are usually centered in a certain area’s. I don’t think it is random that constantly around the world there is a difference between mtDNA and Y DNA haplogroups.

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